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What is LSC2B?

LSC2B is defined in IEC 62271-200

It is defined as - Loss of Service Continuity category, medium voltage parts are compartmented using metal partitions (PM class) which are connected to earth and which separate:
  • the busbars
  • the withdrawable part (circuit breaker, fuse-contactor, disconnector truck or earthing truck
  • MV connections, earthing switch, current sensors and voltage transformers
It provides a guarantee that there is a high level of protection of people; when a compartment containing a main circuit is open, the other compartments and/or functional units may remain energised.

MCset has a LSC category of LSC2B
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